Pen



FIG. 1 is a rear elevational view of the pen showing my new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a side elevational view of the pen body with the cap member removed for ease of illustration;

FIG. 8 is a front elevational view of the pen body with the cap member removed for ease of illustration;

FIG. 9 is a perspective view of the pen showing my new design; and,

FIG. 10 is a perspective view of the pen with the cap separated from the body. 

I claim the ornamental design for a pen, as shown and described. 